Help KitKat 4.4 OTA Failure

[Ptarmigan]

Hello,

I've been searching to see if anyone else has this issue but haven't seen it anywhere, so apologies if this is a duplicate thread!

My Nexus 7 2012 advised me I could do the update today, and it has gone wrong

Device: Nexus 7 2012 WiFi only version 16GB Memory

Had been rooted, believe it was unrooted at time of 4.4 OTA update

Has ClockworkMod Recovery installed may not be the latest.


Using Unified_Android_ToolKit v1.1.0 installed on root of c:\ drive
ADB drivers are installed

Problem: During or after the 4.4 OTA update the device showed a screen where the 4 coloured circles rotate, merge into a white circle, then de-merge and repeat the cycle

I have attempted to sideload a .zip to the device using Unified_Android_ToolKit v1.1.0 and ClockworkMod.

Both sides seem to start OK with ClockworkMod getting to "Sideload started ... and waiting for the package to be sent.

At this point the device is showing the Android on his back with the exclamation mark in a red triangle.

Unified_Android_ToolKit v1.1.0 detects the device, gives its serial number then hangs at "Waiting for adb mode"

I have tried Using Stock Recovery, CWM and TWRP to sideload stock

When I cancel the sideload on the device I get the messages:

Restarting abd...
status 0
No package received
​

So I am assuming that the device side is listening but the PC is not sending.

I though USB Debugging was enabled as a result of ClockworkMod, amd I wrong?

Any help gratefully received!

 

[John Bean]

Has ClockworkMod Recovery installed

The OTA requires stock recovery, so that's almost certainly the reason for the failure.

My advice is to flash stock 4.4 recovery and system images with fastboot and put your custom recovery back on afterwards.

Assuming wifi version:

Download this: https://developers.google.com/android/nexus/images#nakasikrt16s

Extract the zip then from a command prompt:

fastboot flash bootloader bootloader-grouper-4.23.img
fastboot reboot-bootloader
fastboot update image-nakasi-krt16s.zip

Done.

 

[Ptarmigan]

Thanks for your reply John Bean,

using the search "fastboot flash bootloader" I found an excellent article on Webmastersdiary blog that gave a step by step that worked first go.